Refrigerator-car



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c. s. MILLER -& J. E. DU 301s. vRBFRIGHRAQIJOR GAR. No. 520,442. Patented May 29, 1894.

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REFRIGERATOR GAR.

Patented May 29, 1894.

UNITED STATES FFI on.

PATENT d CLINTON S. MILLER AND JOHN E. DU BOIS, OF TIFFIN, OHIO.

REFRIGERATOR-CAR.

SPECIFICATION forming part of Letters Patent No. 520,442, dated May 29, 1894. Application filed March 25, 1893. Serial No. 467,557- (No model.)

To all whom it may concern:

Be It known that we, CLINTON S. MILLER and JOHN E. DU BOIS, citizens of the United States, residing at Tiffin, in the county of Seneca and State of Ohio, have invented a new and useful Refrigerator-Oar, of which the followlng is a specification.

Our invention relates to refrigerator cars, andrefers particularly to mechanism for operatlng a pump whereby the refrigerating pipeks are supplied with the fluid from the The object of our invention is to provide a simple, inexpensive, and efiective mechanism which can'be applied to any ordinary car, in present use, without altering or adapting the construction of the latter.

A further object of our invention is to proyide an operating mechanism which derives 1t-s power from the axle of the car, and which can be disconnected from such source of power without entering or opening the car.

Further objects and advantages of our invention will appear in the following descript1on and the novel features thereof will be particularly pointed out in the appended claim. 7

In the drawingsz-Figurel is a perspective view of a refrigerator car embodying our invention. Fig. 2 is a longitudinal sectional View of the same. Fig. 3 is a detail view of the movable pulley. Fig. 4 is a similar view of the fixed pulley. Fig. 5 is a similar view of the supporting lever.

Llk6 numerals denote corresponding parts throughout the several views.

1 designates the body of the car, 2 the ordlnary truck, 3 one of the axles carried by sa1d truck, 4 an ordinary priming tank, 5 the refrlgerating coils or pipes, and 6 a pump whlch may be of any preferred construction, connected to said tank and to the coils or pipes to produce, when in motion, a circulation of the refrigerating fluid.

7 represents adivided sectional friction pulley or roll, the same being halved to form the duplicate superposed semicircular sections 8 which are provided with integral off-standing collar portions projected from both sides and having clutches 9 to engage the axle 3.

ings, of duplicate perforated flanges or cars which are connected, when in place upon the axle, by the fastening bolts 10, and have their outer edges disposed in a line flush with the periphery of the roll. The friction pulley or roll 7, which for convenience we have termed the fixed pulley or roll, is thus fastened securely upon the axle and turns therewith, and the same may be secured as described to any car axle in use.

11 represents the movable friction pulley or roll which is so mounted as to normally bear in contact with the surface of the fixed pulley or roll and rotate therewith, and 12 represents a pitmau which is pivotally connected to this movable pulley or roll and to the piston rod 13 of the above mentioned pump, whereby the rotation of the pulley 11 is communicated through said pitman to the pump.

The truck of a railway car in motion is continually rocking and the body of the car is vibrating vertically in relation thereto, and as it is necessary in the carrying out of our invention to provide means to preserve an even and constant pressure and contact between the movable and fixed friction pulleys or rolls, we employ a tension device constructed as follows: 1e represents a bell-crank supporting lever, one of whose arms, 15, is approximately horizontal in position, and is provided at its terminal with a bearing 16 for the spindle 17 of the pulley or roll 11. The other, approximately vertical, arm 18 of the supporting lever is provided with an eye 19. The supporting lever is pivotally connected to a stationary part of the body of the carat the angle between its arms, as shown at 20.

21 represents a stem which extends through the eye 19 at the free terminal of the arm 18 of the supporting-lever, is provided at its innor end with a head 22 to engage said eye, and extends outwardly throughthe casing of the car. Upon this stem is arranged a coiled spring 23 which bearing against the free end of the arm 18, normally holds the movable pulley or roll in contact with the fixed pulley or roll.

Connected to the free outer end of the stem These clutches-consist, as shown in the draw- 21 is a cam-lever 24, by means of which the stem may be drawn outward, thereby drawing the upper arm of the supporting-lever in the same direction and raising the movable friction roll from contact with the fixed roll.

It will be seen from the above description that the contact between the friction rolls will be preserved at all times, even although the truck and car-body rock and roll in a manner common to such parts, and therefore the pump will be operated steadily during the motion of the car. Furthermore, the motion of-the pump may be checked at anytime without opening the car, by the manipulation of the cam-lever.

Goods which areanot perishable and therefore do not need refrigeration maybe shipped in a car equipped with our improved mechanism,it being simply necessary to disconnect the friction rolls by the operation of the camlever as described. g

It will be plain to those skilled in this art that our improved mechanism for operating the pump may be attached readily, quickly, and cheaply to any car now in use, and as changes in form, proportion, and minor details of construction maybe resorted to without departing from the spirit or sacrificing the advantages of our invention, we reserve the right to make such alterations within the scope of our invention.'

It will be apparent, furthermore, that our improved means for operating the pump for forcing the refrigerating fluid through the distributing tubes will operate with equal effect when the car is moving in either direction. The direction in which the car is moving does not affect the operation of the parts.

The liquid which we propose to employ in connection with our refrigerating device is composedof carbonate of ammonia and sodium hypo-sulphite, the said combination producing a liquid which is incongealable. Any suitable or approved means may be employed to preserve the refrigerating liquid at the desired temperature.

A suitable thermostat may be employed in connection with the car in order to preserve an even temperature whereby fruits and vegetables may be transported in a temperature corresponding with that in which they were grown, and thus preventing drying and wilting while on the way.

It will be understood that changes in the form, proportion and minor details of the construction of our device may be resorted to without departing from the spirit or sacrificing any of the advantages of our invention.

Having thusdescribed our invention, what we claim, and desire to secure by Letters Patent of the United States, is

The combination with a box-car having a friction roll on one of its axles, and a refrigcrating apparatus mounted within the car and having an upright distributing pump, with its piston rod moving there-below; of a suitably mounted bell-crank lever provided at one end with a bearing block, a movable friction pulley disposed directly under the pump and having a spindle journaled in the lever bearing block, a pitman pivoted to one side of the movable friction pulley and to the pump piston rod, an operating stem or link connected to the free end of the bell-crank lever, a cam lever pivoted to the outer end of said stem outside of the car-body, and a spring coiled on said stem and normally pressing against one end of said bell-crank lever, substantially as and for the purpose described.

In testimony that we claim the foregoing as our own we have hereto affixed our signatures in the presence of two witnesses.-

CLINTON S. MILLER. JOHN E. DU BOIS.

Witnesses:

JOHN H. SIGGERS, E. G. Sreonns. 

